<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <script src="./js/vue.js"></script>
</head>

<body>

    <div id="app">
        <!-- 
            变异方法(修改原有数据)
                - push()
                - pop()
                - shift()
                - unshift()
                - splice()
                - sort()
                - reverse()
            替换数组(生成新的数组)
                - filter()
                - concat()
                - slice()

        -->
        <div>
            <span>
                <input type="text" v-model='fname'>
            </span>
            <button @click="add">添加</button>
            <button @click="del">删除</button>
            <button @click="change">替换</button>
        </div>
        <ul>
            <li :key="index" v-for="(item,index) in list">{{item}}</li>
        </ul>

    </div>

    <script lang="text/javascript">
        var vm = new Vue({
            el: "#app",
            data: {
                fname: '',
                list: ['apple', 'orange', 'banana']
            },
            methods: {
                add: function () {
                    this.list.push(this.fname);
                    this.fname = '';
                },
                del: function () {
                    this.list.pop();
                },
                change: function () {
                    this.list = this.list.slice(0, 2);
                }

            }
        })
    </script>

</body>

</html>